Record Quantum Tunneling Time in an Air-Stable Exchange-Bias Dysprosium Macrocycle

• DOI: 10.1021/jacs.4c07412
• Publication Date: 2024-07-08T14:42:58Z
• Authors: Zhenhua Zhu; Sagar Paul; Chen Zhao; Jianfeng Wu; Xu Ying; Liviu Ungur; Wolfgang Wernsdorfer; Franc Meyer; Jinkui Tang
• Keywords: Dysprosium

In recent years, dysprosium macrocycle single-molecule magnets (SMMs) have received increasing attention due to their excellent air/thermal stability, strong magnetic anisotropy, and rigid molecular skeleton. However, they usually display fast zero-field quantum tunneling of the magnetization (QTM) rate, severely hindering data storage applications. Herein, we report design, synthesis, characterization an air-stable monodecker didysprosium integrating single-ion near-perfect local crystal field (CF) symmetry, efficient exchange bias. These indispensable features enable clear-cut elucidation crucial role very weak antiferromagnetic coupling on dynamics, creating a prominent SMM with large effective energy barrier (